Originally Posted by Kakaze
Everything I've heard points to Apple having it locked at 64 megs.
I'm sure someone will find a way to unlock it but until then...
that's outright wrong and apple itself says that OS X dedicated a minimum of 80MB of system ram to the video card. the OS itself will scale up to a number around 224 (i don't remember the exact number but it wasn't the exact number that the physical spec calls for).
don't worry guys, you're not locked at 64mb